Reversible grinding apparatus



(No Model.)

T. R. ALMOND.

REVERSIBLE GRINDING APPARATUS. A

N0.'601,391. Patented Mar. 29,1898.

, ENTOR ATTORNEYS WITNESSES:

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THOMAS R. ALMOND, OF DUNVVOODIE HEIGHTS, NEW YORK.

REVERSIBLE GRjlNDiNG APPARATUS.

SPECIFICATION forming part of Letters Patent hi0. 601 ,3:91 dated March 29, 1898.

Application filed October 1, 1897.

To all whom it may concern:

Be it known that I, THOMAS R. ALMOND, a resident of Dunwoodie Heights, Westchester county, State of New York,.have invented an Improved Reversible Grinding Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming part of this specification, wherein Figure l is a side elevation of myimproved grinding apparatus, showing the emery-wheel or grindstone at one end; and Fig. 2 is a side elevation, partly in longitudinal section, of the same, but showing the emery-wheel or grindstone reversed.

This invention has for its object to provide a simple mechanism for permitting the reversal of a grindstone, emery-wheel, or the like, so that the rotation of its oircu Inference, as well as the rotation of its face, may be reversed, and so that both faces of the stone or wheel may be conveniently exposed to action.

The invention consists, mainly, in combining the grindstone or emery-wheel and its short shaft with a sleeve which is definitely hung in a fixed frame and with means for firmly clamping the shaft in said sleeve and for allowing it to be easily removed therefrom and reversed therein, as hereinafter described.

In the accompanying drawings, the letter A represents the stationary framework of my improved apparatus, the same carrying two boxes at b, in which a hollow sleeve B hasits definite bearings, said hollow sleeve carrying a pulley d or analogous wheel for allowing it to be conveniently rotated either by means of a belt, gear-wheel, or equivalent organism. The ends of the sleeve B project slightly beyond the supporting boxes or bearings b and are made flaring, as is clearly shown in Fig. 2.

D is the grindstone or emery-Wheel, which is mounted upon a shaft E, which shaft near said grindstone has a tapering collar 6, While at its free end it is threaded to receive a tapering nut f. The tapers of the collar 6 and nut f are of such character as to conform to Serial No, 653,691. (No model.)

the flaring ends of the sleeve B, as clearly appears from an inspection of Fig. 2 of the drawings. It is evident that when the nut f is tightened it causes, by means of the two tapers e f, the shaft E to be rigidly secured to and intimately connected with the rotary sleeve B, so that upon the said sleeve being revolved by means of a belt or the like the shaft E and grindstone D will participate in such revolution. Itis also evident that by means of the arrangement of parts hereinabove described it is very easy to reverse the grindstone from the position shown in Fig. 1 to that shown in Fig. 2, and all that is necessary to accomplish this being to unfasten the nut f, pull the shaft E from the sleeve 13, and insert said shaft into the open opposite end of the sleeve and refasten the nut. It is also evident that when such reversal takes place from the position of the stone shown in Fig. 1 to that shown in Fig. 2 the grindstone itself receives rotation in the opposite direction from that which it had in the position shown in Fig. 1, so that its periphery, which may have become useless by wear when rotated in the first 1 direction, may become useful again as it is rotated in the opposite direction. It is also evident that the face of the grindstone which is exposed to the tool held in the right hand, as usual, for sharpening or abrading surfaces, as in Fig. 1, will be put out of action in the position shown in Fig. 2, and the opposite face thus put into action, so that with the aid of my improvement a grindstone maybe utilized regarding bot-hits faces, and utilized,further, to keep its periphery in a constantly operative position, it being evident that when the rotation in one direction shall have rendered the stone blunt-a rotation in the opposite direction will find it operative until that in turn has caused it to blunt, when reversal again takesplace, ac.

What I claim, and desire to secure by Letters Patent, is

l. The combination of the frame A having bearings a b, with the rotating single sleeve B hung therein, and with the continuous shaft E extending throughout said sleeve and reversible therein, such shaft carrying the reversible grindstone as and for the purposes E to the sleeve B and to permit of its reversal described. in said sleeve, as and for the purpose de- 2. The combination of the frame A having scribed.

bearings a b, with the sleeve B hung therein, THOMAS R. ALMOND.

saidsleeve having flaring ends, and with the WVitnesses:

shaft E and wheel D, tapering collar e and FRITZ V. BRIESEN,

tapering nut f, all arranged to bind the shaft MAURICE BLOCK. 

